/*
* jSwipe - jQuery Plugin
* http://plugins.jquery.com/project/swipe
* http://www.ryanscherf.com/demos/swipe/
*
* Copyright (c) 2009 Ryan Scherf (www.ryanscherf.com)
* Licensed under the MIT license
*
* $Date: 2009-07-14 (Tue, 14 Jul 2009) $
* $version: 0.1.2
*
* This jQuery plugin will only run on devices running Mobile Safari
* on iPhone or iPod Touch devices running iPhone OS 2.0 or later.
* http://developer.apple.com/iphone/library/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html#//apple_ref/doc/uid/TP40006511-SW5
*/
(function($) {
    $.fn.swipe = function(options) {
        // Default thresholds & swipe functions
        var defaults = {
            threshold: {
                x: 100,
                y: 50
            },
            swipeLeft: function(t) { alert('swiped left') },
            swipeRight: function(t) { alert('swiped right') }
        };
        var options = $.extend(defaults, options);
        if (!this) return false;
        return this.each(function() {
            var me = $(this)
            // Private variables for each element
            var originalCoord = { x: 0, y: 0 }
            var finalCoord = { x: 0, y: 0 }
            // Screen touched, store the original coordinate
            function touchStart(event) {
                //console.log('Starting swipe gesture...')
                originalCoord.x = event.targetTouches[0].pageX
                originalCoord.y = event.targetTouches[0].pageY
            }
            // Store coordinates as finger is swiping
            function touchMove(event) {
                event.preventDefault();
                finalCoord.x = event.targetTouches[0].pageX // Updated X,Y coordinates
                finalCoord.y = event.targetTouches[0].pageY
            }
            // Done Swiping
            // Swipe should only be on X axis, ignore if swipe on Y axis
            // Calculate if the swipe was left or right
            function touchEnd(event) {
                //console.log('Ending swipe gesture...')
                var changeY = originalCoord.y - finalCoord.y
                if (changeY < defaults.threshold.y && changeY > (defaults.threshold.y * -1)) {
                    changeX = originalCoord.x - finalCoord.x
                    if (changeX > defaults.threshold.x) {
                        defaults.swipeLeft(this)
                    }
                    if (changeX < (defaults.threshold.x * -1)) {
                        defaults.swipeRight(this)
                    }
                }
            }
            // Swipe was started
            function touchStart(event) {
                //console.log('Starting swipe gesture...')
                originalCoord.x = event.targetTouches[0].pageX
                originalCoord.y = event.targetTouches[0].pageY
                finalCoord.x = originalCoord.x
                finalCoord.y = originalCoord.y
            }
            // Swipe was canceled
            function touchCancel(event) {
                //console.log('Canceling swipe gesture...')
            }
            // Add gestures to all swipable areas (ie will throw an exception here so use a try-catch)
            try {
                this.addEventListener("touchstart", touchStart, false);
                this.addEventListener("touchmove", touchMove, false);
                this.addEventListener("touchend", touchEnd, false);
                this.addEventListener("touchcancel", touchCancel, false);
            } catch (e) { }
        });
    };
})(jQuery);
	
